/******************************************************************************
 * Copyright (c) 2022 Telink Semiconductor (Shanghai) Co., Ltd. ("TELINK")
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *****************************************************************************/

/********************************************************************************************************
 * @file	mdec.c
 *
 * @brief	This is the source file for B91
 *
 * @author	Driver Group
 *
 *******************************************************************************************************/
#include"mdec.h"
#include "compiler.h"
#include "reg_include/mdec_reg.h"
#include "analog.h"
#include "clock.h"

/**
 * @brief		This function is used to initialize the MDEC module,include clock setting and input IO select.
 * @param[in]	pin	- mdec pin.
 * 					  In order to distinguish which pin the data is input from,only one input pin can be selected one time.
 * @return		none.
 */
void mdec_init(mdec_pin_e pin)
{
	analog_write_reg8(mdec_rst_addr,(analog_read_reg8(mdec_rst_addr) & (~FLD_CLS_MDEC)) | pin);//A0/B7/C4/D0/E0
}

/**
 * @brief		This function is used to read the receive data of MDEC module's IO.
 * @param[out]	dat		- The array to store date.
 * @return		1 decode success,  0 decode failure.
 */
unsigned char mdec_read_dat(unsigned char *dat)
{
	unsigned char m0,m1,m2,data_crc;

	dat[0]=analog_read_reg8(0x6a);
	dat[1]=analog_read_reg8(0x6b);
	dat[2]=analog_read_reg8(0x6c);
	dat[3]=analog_read_reg8(0x6d);
	dat[4]=analog_read_reg8(0x6e);

	m0= ((dat[0]>>5)<<4);
	m1= dat[0]&0x07;
	m2= m0+m1;
	data_crc=(((m2+dat[1])^dat[2])+dat[3])^0xa5;

	if(data_crc==dat[4]){
		return 1;
	}
	return 0;
}


